Gaya APA

GRIMNAMU, ., Novianti, E, N. (2014). Why? People : Stephen Hawking . Jakarta: PT Elex Media Komputindo.

Gaya MLA

GRIMNAMU, ., Novianti, Endah, Nawang. "Why? People : Stephen Hawking". Jakarta: PT Elex Media Komputindo, 2014. Text.